"Wert party to" can be defined as being involved or a participant in something. The antonyms for this phrase include being excluded, uninvolved, or not taking part in something. Other antonyms may include being isolated, withdrawn, or disconnected. In the context of legal proceedings, the antonyms may include being a non-party, a bystander, or a witness. In social situations, the antonyms may include being an outsider, a wallflower, or a loner. Understanding the antonyms for "wert party to" can provide insight into different perspectives and help to identify individuals who may not be involved in a particular situation.